Hawai Seasons and Weather
Oahu has two season, the wet and dry season. This is really the only way for one to differentiate between the winter and summer. May through October will be the driest months and September through April being the wetter months of the year. Yearly air temperatures range from the mid 70’s to the mid 80’s. The trade winds help to moderate Oahu’s temperature.
The trade winds account for a large percentage of Hawaii’s wind patterns. They will tend to blow out of the North East all year round, the strongest in the summer months. June – December: North East to East North East trades will cycle through periods ranging from strong to light. Generally you may see 7-10 days of SE trade followed by 3-5 days of lighter more variable wind. January – March: Winds trend lightly from a north easterly direction often producing glassy conditions for the North Shore. Winds can be variable in these months, and Kona winds can blow from the southwest usually bringing higher humidity and rain.
The season for the North Shore of Oahu will pick will follow the North Swell season. North swell season can stretch from October through March. The largest and most consistent swells occur from November through March with storms in the North Pacific push swell towards Hawaii. South Swells will be more prevalent from April through September and focuses on the south end of the country.